Changing saved data to maps

[garcia-s]

Hi, I mean no harm but I changed the package a little bit and got this code going on the doc parser. I was able to save the session info as a map instead of a string. Don't really know what problems this might introduce but maybe you can add it to the project.

module.exports = {
    read (doc) {
        return doc;
    },

    save (doc) {
        return JSON.parse(JSON.stringify(doc));
    }
};

Here is a screenshot of what the data looks like on firestore. Your proyect save me from having to change the whole db BTW.